MCQOPTIONS
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MCQOPTIONS
This section includes 210 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics and Telecommunication Engineering [ENT knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
In GSM-900 system, uplink frequency is …………… |
| A. | 935MHz-960MHz |
| B. | 930MHz-955MHz |
| C. | 940MHz-965MHz |
| D. | 945MHz-970MHz |
| Answer» B. 930MHz-955MHz | |
| 152. |
GSM Architecture consists of ….. Interface |
| A. | Um |
| B. | Abis |
| C. | A |
| D. | All the above |
| Answer» E. | |
| 153. |
GSM Architecture consists of ….. |
| A. | HLR |
| B. | EIR |
| C. | VLR |
| D. | All the above |
| Answer» E. | |
| 154. |
DCS 1800 has the uplink frequency range |
| A. | 1815MHz-1890MHz |
| B. | 1800MHz-1875MHz |
| C. | 1805MHz-1880MHz |
| D. | 1810MHz-1885MHz |
| Answer» D. 1810MHz-1885MHz | |
| 155. |
DCS 1800 has the uplink and downlink frequency interval of ….. |
| A. | 25MHz |
| B. | 45MHz |
| C. | 95MHz |
| D. | 90MHz |
| Answer» D. 90MHz | |
| 156. |
DCS 1800 has ……number of duplex channels |
| A. | 354 |
| B. | 374 |
| C. | 385 |
| D. | 395 |
| Answer» C. 385 | |
| 157. |
……..services are supported by the GSM |
| A. | Bearer Services |
| B. | Teleservices |
| C. | Supplementary Services |
| D. | All the above |
| Answer» E. | |
| 158. |
2G GSM architecture follows ……. Reference Model |
| A. | OSI Model |
| B. | TCP/IP Model |
| C. | both a and b |
| D. | None of the above |
| Answer» B. TCP/IP Model | |
| 159. |
Which kind of switching technique indicates the transfer of coded values from input to output during the same interval of time? |
| A. | Space Switching |
| B. | Time Switching |
| C. | Combination Switching |
| D. | None of the above |
| Answer» B. Time Switching | |
| 160. |
The-------------- is a circuit switched network, while the -------------- is a packet- switched network |
| A. | telephone, ATM |
| B. | SONET and FDDI |
| C. | satellite, telephone |
| D. | FDDI and SONET |
| Answer» B. SONET and FDDI | |
| 161. |
Which form/s of grading design has/have the tendency to share every trunk between equal number of groups? |
| A. | Homogeneous Grading |
| B. | Heterogeneous Grading |
| C. | Skipped Grading |
| D. | All of the above |
| Answer» B. Heterogeneous Grading | |
| 162. |
When a switch capacity is full, calls coming into that switch are said to be____. |
| A. | open |
| B. | shorted |
| C. | blocked |
| D. | shunted |
| Answer» D. shunted | |
| 163. |
Example of circuit switching and S&F (Stored and Forward) switching is |
| A. | Telephone and Post of Telegraph |
| B. | Video Signal Post or Telegraph |
| C. | Digital Signal Post or Telegraph |
| D. | None of above |
| Answer» B. Video Signal Post or Telegraph | |
| 164. |
In ------------- each packet is treated independently of all others |
| A. | circuit switching |
| B. | datagram switching |
| C. | frame switching |
| D. | none of the above |
| Answer» C. frame switching | |
| 165. |
Which type of switching network involves the establishment of a dedicated path between two stations? |
| A. | Message Switching |
| B. | Packet Switching |
| C. | Circuit Switching |
| D. | Manual Switching |
| Answer» D. Manual Switching | |
| 166. |
In message switching system, an incoming message gets ____ especially if the required route is busy. |
| A. | Lost |
| B. | Stored in a queue & retransmitted |
| C. | Sampled |
| D. | Recovered |
| Answer» C. Sampled | |
| 167. |
In packet switching, what does the header of each short size of packet consist of? |
| A. | Source address |
| B. | Destination address |
| C. | Intermediate nodes |
| D. | All of the above |
| Answer» E. | |
| 168. |
If a group of trunk is offered 1200 calls during the busy hour & 20 calls are lost along with the average call duration of about 7 min, then what would be the total duration of congestion period? |
| A. | 21.6 sec |
| B. | 42.2 sec |
| C. | 57.6 sec |
| D. | 98.2 sec |
| Answer» D. 98.2 sec | |
| 169. |
In two-stage network, which phenomenon/situation occurs due to impossible connectivity of given incoming trunk to selected outgoing trunk specifically because of link utilization for other connection between primary and secondary switches? |
| A. | Bursting |
| B. | Blinking |
| C. | Blocking |
| D. | Burning |
| Answer» D. Burning | |
| 170. |
By how many times does the time division exchange exhibit connection and disconnection with respect to every millisecond, due to its ability of using rearrangeable networks? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» D. 16 | |
| 171. |
Which signals are regarded as call-progress signals as they are sent back to inform the caller about the progress of the call? |
| A. | Address Signals |
| B. | Status Signals |
| C. | Call request Signals |
| D. | ANSWER Signals |
| Answer» C. Call request Signals | |
| 172. |
Which among the following can be adopted as a dedicated path between the source and destination in circuit switching? |
| A. | Physical Wire |
| B. | Radio Link |
| C. | Co-axial Cable |
| D. | All of the above |
| Answer» E. | |
| 173. |
Consider the statements given below. Which among them represents the operational step executed in datagram Packet Switched Network? |
| A. | Fixed Path is assigned between nodes from source to destination |
| B. | First Come First Serviced basis is applicable |
| C. | Necessity of an identifier for a connection between source host & destination host |
| D. | Transmission of short messages of one or two packet length |
| Answer» E. | |
| 174. |
Rectangular crosspoint array is a |
| A. | Space switching |
| B. | Electronic switching |
| C. | Digital switching |
| D. | Time switching |
| Answer» B. Electronic switching | |
| 175. |
A time division time switch can be controlled in |
| A. | Sequential write/random read |
| B. | random write/random read |
| C. | random write/sequential read |
| D. | All of above |
| Answer» E. | |
| 176. |
ESS stands for |
| A. | Electronic Switching System |
| B. | Effective Electronic Switching System |
| C. | Early Electronic Switching System |
| D. | none of these. |
| Answer» B. Effective Electronic Switching System | |
| 177. |
In a one-stage space division switch, if N = 200, the number of cross points is |
| A. | 10,000 |
| B. | 20,000 |
| C. | 40,000 |
| D. | 30,000 |
| Answer» D. 30,000 | |
| 178. |
Circuit switching takes place at the layer of |
| A. | data line |
| B. | physical |
| C. | network |
| D. | transport |
| Answer» C. network | |
| 179. |
Trunks are the lines that run between |
| A. | switching system and power plant |
| B. | Local area network |
| C. | Switching stations |
| D. | Subscribers and exchange |
| Answer» D. Subscribers and exchange | |
| 180. |
Availability of single processor system is given by |
| A. | MTBF/MTTR |
| B. | MTTR/MTBF |
| C. | MTTR/(MTBF+MTTR) |
| D. | MTBF/(MTBF+MTTR) |
| Answer» E. | |
| 181. |
Unavailability of single processor system is given by |
| A. | MTBF/MTTR |
| B. | MTTR/MTBF |
| C. | MTTR/(MTBF+MTTR) |
| D. | MTBF/(MTBF+MTTR) |
| Answer» C. MTTR/(MTBF+MTTR) | |
| 182. |
Availability of Dual processor system is given by |
| A. | MTBF2/MTTR2 |
| B. | 2MTTR/MTBF2 |
| C. | MTTR2/2(MTBF+MTTR)2 |
| D. | (MTBF)2/(MTBF)2+2(MTTR)2 |
| Answer» E. | |
| 183. |
Unavailability of Dual processor system is given by |
| A. | MTBF2/MTTR2 |
| B. | 2MTTR2/MTBF2 |
| C. | 2MTTR2/2(MTBF+MTTR)2 |
| D. | (MTBF)2/(MTBF)2+2(MTTR)2 |
| Answer» C. 2MTTR2/2(MTBF+MTTR)2 | |
| 184. |
Who developed the fundamental of trunking theory? |
| A. | Newton |
| B. | Ohm |
| C. | Erlang |
| D. | Einstein |
| Answer» D. Einstein | |
| 185. |
MTTR means |
| A. | Maximum Time To Repair |
| B. | Most Time To Repair |
| C. | Mean Time To Repair. |
| D. | Maximum Time To Repair |
| Answer» D. Maximum Time To Repair | |
| 186. |
Which form/s of grading design has/have the tendency to share every trunk between equal numbers of groups? |
| A. | Homogeneous Grading |
| B. | Heterogeneous Grading |
| C. | Skipped Grading |
| D. | All of the above |
| Answer» B. Heterogeneous Grading | |
| 187. |
In a time multiplexed space switching system, one speech sample appears every |
| A. | 125 micro sec |
| B. | 20 msec |
| C. | 125 msec |
| D. | 1 sec |
| Answer» B. 20 msec | |
| 188. |
Time synchronization is necessary in |
| A. | FDM |
| B. | TDM |
| C. | WDM |
| D. | Quadrature multiplexing |
| Answer» C. WDM | |
| 189. |
Three methods of switching are |
| A. | circuit switching, packet switching, and protocol switching |
| B. | circuit switching, packet switching, and message switching |
| C. | Loop switching, packet switching, and message switching |
| D. | Node switching, packet switching, and message switching |
| Answer» C. Loop switching, packet switching, and message switching | |
| 190. |
If ‘n’ number of users are present in a network with point-to-point links, then how many links will be required in the network? |
| A. | n (n – 1) |
| B. | n (n – 1) / 2 |
| C. | n (n – 1) / 4 |
| D. | n (n – 1) / 8 |
| Answer» C. n (n – 1) / 4 | |
| 191. |
Which among the following is/are adopted by cross bar systems with hard wired control subsystem? |
| A. | Relays |
| B. | Latches |
| C. | Both a and b |
| D. | None of the above |
| Answer» D. None of the above | |
| 192. |
What is the hardware, used to establish connection as an electrical path between inlet and outlet pair in switching system, known as? |
| A. | Switching Matrix |
| B. | Switching Network |
| C. | Both a and b |
| D. | None of the above |
| Answer» D. None of the above | |
| 193. |
In folded type of network, ____ |
| A. | input lines are folded back to output lines |
| B. | output lines are folded back to input lines |
| C. | input lines are folded back to themselves (input lines) |
| D. | output lines are folded back to themselves (output lines) |
| Answer» C. input lines are folded back to themselves (input lines) | |
| 194. |
For the two-group grading consisting of 14 trunks, availability = 5, Ak = 1.4E and the required grade of service of about 0.01, what would be its traffic capacity? |
| A. | 4.98 E |
| B. | 6.72 E |
| C. | 8.3 E |
| D. | 10 E |
| Answer» B. 6.72 E | |
| 195. |
Which kind of switching system does not comprise any subscriber, concentrator or expander? |
| A. | Crossbar |
| B. | Director Exchange |
| C. | Strowger |
| D. | Tandem |
| Answer» E. | |
| 196. |
What are the Methods to move data through a network of links and switches |
| A. | Packet switching |
| B. | Circuit switching |
| C. | Line switching |
| D. | Both a and b |
| Answer» E. | |
| 197. |
In Electronic Switching Centre (ESC), the transmission rate of X.25 protocol is ____9.6 Kbps. |
| A. | Less than |
| B. | Equal to |
| C. | Greater than |
| D. | None of the above |
| Answer» D. None of the above | |
| 198. |
In a single stage network |
| A. | There is no redundancy |
| B. | There is redundancy |
| C. | Alternative cross points are available |
| D. | Alternative paths are available |
| Answer» C. Alternative cross points are available | |
| 199. |
In _________ resources are allocated on demand. |
| A. | Packet switching |
| B. | circuit switching |
| C. | line switching |
| D. | frequency switching |
| Answer» B. circuit switching | |
| 200. |
The situation when both transmitter and receiver have to work in tandem is referred to as |
| A. | Parallel |
| B. | Serial |
| C. | Synchronous |
| D. | Asynchronous |
| Answer» D. Asynchronous | |